题目内容
19.-What happened to the young trees we planted last week?-The trees ____ well,but I didn't water them.( )
A. | might grow | B. | needn't have grown | ||
C. | would have grown | D. | would grow |
分析 -我们上周种的小树苗怎么了?-这些树本来会长得很好,可我没给他们浇水.
解答 答案:C 句意表达的是与事实相反的假设,要用虚拟;对过去的虚拟要用情态动词加完成时态来构成;needn't have done本不必做缺做了的事,不符合句意.故选C.
点评 虚拟语气是表示与事实相反的假设,构成方式有:对现在或将来,条件句中用一般过去时态,主语用情态动词加动词原形;对过去,条件句中用过去完成时态,主语用情态动词加完成时态.学习时,要牢记构成方式.

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